如何使用 Java 从网站检索 URL？
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How do I retrieve a URL from a web site using Java?
提问by Johnny Maelstrom
I want to use HTTP GET and POST commands to retrieve URLs from a website and parse the HTML. How do I do this?
我想使用 HTTP GET 和 POST 命令从网站检索 URL 并解析 HTML。我该怎么做呢？
回答by Rob Hruska
You can use HttpURLConnectionin combination with URL.
您可以将HttpURLConnection与URL结合使用。
URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
InputStream stream = connection.getInputStream();
// read the contents using an InputStreamReader
回答by Johnny Maelstrom
The ticked/approved answer for this is from robhruska - thank you. This shows the most basic way to do it, it's simple with an understanding of what's necessary to do a simple URL connection. However, the longer term strategy would be to use HTTP Client for more advanced and feature rich ways to complete this task.
对此打勾/批准的答案来自 robhruska - 谢谢。这显示了最基本的方法，它很简单，了解执行简单 URL 连接的必要条件。但是，长期策略是使用HTTP 客户端以更高级和功能丰富的方式来完成此任务。
Thank you everyone, here's the quick answer again:
谢谢大家，这里再次快速回答：
URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
InputStream stream = connection.getInputStream();
// read the contents using an InputStreamReader
回答by kgiannakakis
The easiest way to do a GET is to use the built in java.net.URL. However, as mentioned, httpclient is the proper way to go, as it will allow you among others to handle redirects.
执行 GET 的最简单方法是使用内置的 java.net.URL。但是，如前所述，httpclient 是正确的方法，因为它允许您在其他人中处理重定向。
For parsing the html, you can use html parser.
要解析 html，您可以使用html parser。
